by Kastro
Paper/Archive/CVE-2026-72850

CVE-2026-72850

budibase server — Budibase before 3.40.0 Arbitrary File Write via Path Traversal

EPSS 0.5%public exploitCVSS 9.4
critical.is priorityof 100
47
CVSS 9.4 (CNA)9.4 / 10 × 3028.2Not in CISA KEV+300.0EPSS percentile 44.0.440 × 208.8Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

Budibase before 3.40.0 fails to properly sanitize S3 object keys, allowing authenticated builders to upload files with traversal sequences that are preserved during export. Attackers can craft filenames containing .. segments that escape the temporary directory during workspace export, writing arbitrary content to any path writable by the Budibase process.

Affected

ProductAffectedFixed inSource
server< 3.40.03.40.0CNA

Scores by source

VulnCheck (CNA)9.4CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
VulnCheck (CNA)9.1CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CISA ADPSSVCExploitation: poc · Automatable: no · Technical impact: total

References

exploitgithub.com/Budibase/budibase/security/advisories/GHSA-pxwc-66g3-5f27writeupvulncheck.com/advisories/budibase-before-arbitrary-file-write-via-path-traversal